Additive Haar nullness from Hausdorff dimension #
A set of Hausdorff dimension below the dimension of its ambient finite-dimensional real normed space is null for every normalization of additive Haar measure.
theorem
MeasureTheory.addHaar_eq_zero_of_dimH_lt_finrank
{E : Type u_1}
[NormedAddCommGroup E]
[NormedSpace ℝ E]
[FiniteDimensional ℝ E]
[MeasurableSpace E]
[BorelSpace E]
(μ : Measure E)
[μ.IsAddHaarMeasure]
{s : Set E}
(hs : dimH s < ↑(Module.finrank ℝ E))
:
A set of smaller Hausdorff dimension than its ambient real normed space is null for every additive Haar measure.